<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <p>鼠标修饰符</p>
    <button @click.left="show('left')">左键</button>
    <button @click.middle="show('middle')">中键</button>
    <button @click.right="show('right')">右键</button>
  </div>
  <script src="../vue.js"></script>
  <script>
    let vm = new Vue({
      el: '#app',
      data: {

      },
      methods: {
        show(val) {
          console.log(val);
        }
      },
    })
  </script>
</body>
</html>